We're calling Compton. Hands on her farewell tour. Thank you very much Mr. President. Now that you say a second American has been slain. What is your response will air strikes continue inside Iraq might they expand into Syria. Will you have a full strategy now on license which will satisfy those like prime minister Cameron who calling -- a an imminent threat to all the interests and will it satisfy some of your supporters like senator Feinstein who fears that on this. You may have been too cautious -- So the bottom line is this. Our objective is clear. And that is to degrade and destroy Beisel so it's no longer a threat not destroy Iraq but also the region. And -- United States. In order -- accomplish that the first phase has been to make sure we've got an Iraqi Government that some place and that we are. -- the momentum that I -- Was carrying out and the airstrikes have done that. But now what we need to do is make sure that we've got the regional strategy in place. That can support an ongoing effort not just in the air but on the ground to move that forward. And last week. When this question was asked I was specifically referring to. The possibility of the military strategy inside of Syria that might require. Congressional approval. It is very important from my perspective that. When we send him. Our pilots -- To do a job that we know this is a mission that's gonna work that were very clear on. What our objectives are what our targets are. We've made the case congress we've made the case to the American people and we've got allies behind us so that. It's not just one off but it's something that over time is given be effective. And and so and so the bottom line is this. It's not only that we're going to be. Bringing to justice those who perpetrated this terrible crime against these two. Fine young man. More broadly. The United States will continue to lead. -- regional and international effort against the kind of barbaric. And ultimately empty vision. That I -- represents. And that's gonna take some time but we're gonna get it done I'm very confident up. Did you just say that -- the -- the strategy is to destroy -- or to simply contain them or push them back what we're gonna. Our objective is to make sure that I still is not. The ongoing threat to the region. And we can accomplish that. It's gonna take some time -- gonna take some effort. As we've seen -- al-Qaeda. They're always going to be remnants. That can. Cause Havoc. Any of these networks in part because of the nature of terrorist act activities. You get a few individuals and they may be over terror a terrorist act but what we can do is to make sure that the kind of systemic. And broad based. Aggression that we've seen that I sold -- terrorize us. Primarily Muslims. She Sunni. Terrorize Kurds terrorize not just Iraqis but people throughout the region. -- -- Is degraded to the point where it is no longer the kind of factor that we've seen of being over the last several months.

This transcript has been automatically generated and may not be 100% accurate.

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